Diprotodontidae

Diprotodontidae, from Ancient Greek (dí-), meaning "two", (prôtos), meaning "first", and (odoús), meaning "tooth", is an extinctfamily of large herbivorous marsupials, endemic to Australia and New Guinea during the Oligocene through Pleistocene periods from 28.4 million to 40,000 years ago.

The family primarily consisted of large quadrupedal terrestrial browsers, notably including the largest marsupial that ever lived, the rhino-sized Diprotodon.Nimbadon, which is often considered a basal diprotodontid, was arboreal. Diprotodontids were plantigrade with foot and toes flat relative to the ground.